Generation of periodic stochastic foam models for numerical analysis
2014 (English)In: Journal of cellular plastics (Print), ISSN 0021-955X, E-ISSN 1530-7999, Vol. 50, no 1, 37-54 p.Article in journal (Refereed) Published
Stochastic cellular models of rigid foam based on Voronoi spatial partitioning are generated and investigated for potential use in numerical analysis using finite element methods. Such partitions are deterministic once a distribution of cell nuclei has been defined. A drawback is that the models tend to exhibit a significant share of short edges and small faces. Such small geometrical features are not likely to occur in real foams since they are unfavorable from a surface energy point of view and they also generate problems in numerical analysis due to associated meshing challenges. Through minimization of the surface area, using the computer software Surface Evolver, the Voronoi models are brought to better resemblance with ideal dry foam and the occurrence of small geometrical features is strongly reduced. It is generally seen that different seed point distribution algorithms result in different model topologies. The presented methodology is systematic, parameterized and the results are very promising. Good grounds are provided for modeling of real rigid foam materials, that do not necessarily fully resemble ideal dry foam.
Place, publisher, year, edition, pages
Sage, 2014. Vol. 50, no 1, 37-54 p.
cellular, micro structure, simulation, structural foams
Aerospace Engineering Other Materials Engineering
IdentifiersURN: urn:nbn:se:kth:diva-136575DOI: 10.1177/0021955X13503848ISI: 000328696900002ScopusID: 2-s2.0-84890938110OAI: oai:DiVA.org:kth-136575DiVA: diva2:676496
FunderSwedish Research Council, 50576001
QC 20140124. Updated from accepted to published.2013-12-062013-12-062015-05-05Bibliographically approved